Proctitis is inflammation of the lining (mucosa) of the rectum. It commonly presents with rectal bleeding, urgency, and pain or discomfort with bowel movements. The term is used in gastroenterology, colorectal surgery, primary care, and infectious disease settings. It helps clinicians describe symptoms, localize disease, and plan evaluation of the lower gastrointestinal (GI) tract.

Perianal Abscess is a localized collection of pus near the anus or anal canal. It usually reflects an infection of tissues around the terminal gastrointestinal (GI) tract. Clinically, it is discussed in gastroenterology, colorectal surgery, emergency care, and primary care. It is commonly used as a working diagnosis when a patient presents with acute perianal pain and swelling.

A Fistula is an abnormal connection between two body spaces that do not normally connect. It forms a tract that allows fluid, gas, or intestinal contents to pass from one area to another. In gastroenterology, it commonly involves the bowel, anus, skin, bladder, or female reproductive tract. Clinicians describe, diagnose, and treat Fistula to control infection, reduce symptoms, and address the underlying disease.

Hemorrhoids are enlarged or symptomatic vascular cushions in the anal canal and around the anus. They are a common explanation for rectal bleeding, itching, and tissue prolapse during bowel movements. Clinicians use the term in gastroenterology, colorectal surgery, and primary care when evaluating anorectal symptoms. Hemorrhoids can also be present without causing symptoms and may be found incidentally on exam.

Anal Fissure is a small, linear tear in the anoderm (the thin skin lining the anal canal). It commonly causes sharp pain with defecation and bright red rectal bleeding. It is a frequent diagnosis in outpatient gastroenterology, colorectal surgery, and primary care. It is also discussed in emergency and inpatient settings when evaluating anorectal pain.

Rectal Cancer is a malignant tumor that arises in the rectum, the final segment of the large intestine. In plain terms, it is cancer located just above the anal canal. It is commonly used as a diagnosis in gastroenterology, colorectal surgery, oncology, and radiology. The term also guides how clinicians plan staging tests and treatment pathways.

Colorectal Cancer is a malignant (cancerous) growth that begins in the colon or rectum. It usually develops from the inner lining (mucosa) of the large intestine. It is commonly discussed in gastroenterology, pathology, oncology, and colorectal surgery. It is also a major focus of screening and endoscopic practice (for example, colonoscopy).

A Hyperplastic Polyp is a common, usually benign growth of the lining (mucosa) of the gastrointestinal (GI) tract. It is most often discussed in the colon and rectum during colonoscopy. It can also occur in the stomach and is identified on upper endoscopy with biopsy. In practice, it is mainly used as a pathology diagnosis that helps clinicians estimate future risk and plan follow-up.

An Adenomatous Polyp is a growth arising from gland-forming lining cells (epithelium) of the gastrointestinal (GI) tract. It is most commonly discussed in the colon and rectum during colorectal cancer screening. Clinicians use the term to describe a polyp with dysplastic (pre-cancerous) potential on pathology. It is typically identified and managed through endoscopic evaluation, such as colonoscopy.

Colon Polyps are growths that arise from the inner lining (mucosa) of the colon or rectum. They are commonly found during colonoscopy or other colorectal cancer screening tests. Most are benign at the time they are detected, but some types can progress to cancer over time. In gastroenterology, Colon Polyps are discussed as both a clinical finding and a target for removal and pathologic diagnosis.